Tile for steam-boilers



(No Model'.)

J. o. STEVENS.

TILE FOR STEAM BOILERS.

Patented Apr. 11., 1882.

N. PETERS. Fholo-Lflhagnpm Walhingion. [LC- UNITED STATES PATENT OFFICE.

JOHN G. sTEv Ns, or PITTSBURG, PENNSYLVANIA.

TILE FOR- STEAM-BQl LERS.

SPECIFICATION forming part of Letters Patent No. 256,403, dated April 11, 1882,

1 Application filed January 13,1882. (No model.)

formation is made to adjust itself to the sides of the boilers in their expansion and contrac tion, which changes they undergo by reason of heat and the absence of the same.

In the accompanying drawings, Figure 1 is a view of two steam-boilers in position in perspective. of my tiles. Fig. 3 is an end view of the same, and Fig.4. a side view.

A A is the bed-work of two boilers.

justable tile inposition. shown separate, and is seen in Figs. 2, 4 in different sections and views.

The tile, as will be seen, has concave sides, made so as to fit closely up against the outer surface of a steam-boiler. This concave surface c' c,.a's"seen in Fig. 3, extends from the top of the tile to near the bottom, where there is a square cut-out, as seen in Fig. 3 at c 0 By this means the lower side of the tile will not impinge the boilers sides, and will be made to work freely when in place.

It will be readily seen that when my tile is placed between two boilers, and by heating the same boilers, their sides are made to expand, the tile then will be forced upward, but still 3, and

Fig. 2 is a perspective view of one B B 1 are two boilers in position.v c c c are my ad-- 0 is-one of my tilesfitting closely to the sides of the boilers, and that when the heat is reduced contraction begins and the tile will fall, still keeping up a close fit.

It has been the fault of other tile heretofore used for this purpose that when any contraction of the boilers would take place the old kind of tile would fall down and become closely wedged in between the boilers, and that when afterward an expansion would take place the boilers would be forced outward, to the great injury of the foundations of the same.

lmakemy tilepreferablyofearth,adequately burned, and of various sizes, to suit all classes of boilers.

Though I prefer clay for my tile, yet they may be made of other materials, such as iron, steel, and like metals. Hence I do not confine myself to clay alone.

I am aware of the fact that certain shapes of tile have heretofore been used for the purpose I intend for mine; but they have not been sufficiently adjustable, lacking that important property setforth descriptive of my tile. Therefore I do not desire to claim an article of tile for the purpose herein set forth, broadly; but

What I do claim, and desire to secure Letters Patentfor, is-

As a new article of manufacture, a self-adjusting tile for steam-boilers, having the concave sides 0 c and cut-out c 0 substantially as described and shown.

In testimony that Iclaim the foregoing as my invention I hereto set my hand in presence of two witnesses.

JOHN (J. STEVENS. Witnesses:

I J oHN H. GRATTY,

\ THos. J. MALOY. 

